Author Institution: Department of Chemistry, Massachusetts Institute of Technology; Wiess School of Natural Sciences, Rice University

en_US

dc.description.abstract

We report measurements of the rate of depolarization of a single rotational level of formaldehyde in the absence of an external field. The level in question is $\bar{A}A_{2} V_{4}=1, J=1, K_{*}=0$. Previous rotational state-to-state measurements in the $H_{2}CO \bar{A}$ state by Transient Gain and Transient Polarization Spectroscopies suggested a remarkable resistance to depolarization, even for $\Delta J=\pm 1.\pm 2$ rationally inelastic processes, and a strong propensity for electric a-dipole collision-induced inelastic transitions. At zero electric field, elastic depolarization within J=1 are dipole forbidden; however. M-changing transitions could occur via two-step $1_{0.1}\rightarrow(O_{0.2} or 2_{0.3})\rightarrow 1_{0.4}$ processes. The transient response within the $1_{g}$, level is monitored by various PUMP and PROBE polarization schemes. The transient gain data are fitted by various master equation models which provide information about the direct vs. sequential nature of the depolarization process.

en_US

dc.format.extent

136295 bytes

dc.format.mimetype

image/jpeg

dc.language.iso

English

en_US

dc.publisher

Ohio State University

en_US

dc.title

J-REORIENTATION IN THE $H_{2}CO\bar{A}^{1}A_{2}4^{1}1_{0,1}$ ROTATIONAL LEVEL

en_US

dc.type

article

en_US

Items in Knowledge Bank are protected by copyright, with all rights reserved, unless otherwise indicated.